ESET Cyber Security and ESET Cyber Security Pro are updated at least once a day with new virus definitions and occasional program component upgrades. These updates will fail if your Username or Password is invalid or entered incorrectly.

Solution

Version 6 (License Key)

After installing ESET Cyber Security and ESET Cyber Security Pro, you will automatically be prompted to enter your License Key to activate your product. If you skipped this step, or your product is still not activated, follow the steps below: